"I really don't feel like there's a quarterback in the league who can beat me in a 40-yard dash," Vick said. "If somebody wants to set something up, I'd be more than glad to accept the challenge. But as of right now I'm going to say me. But Colin Kaepernick is fast and RGIII is fast, as well."

Vick's speed was also on display earlier this month when he beat -- or said he beat, depending on whose story you believe -- running back LeSean McCoy in the 40-yard dash. The same topic that prompted the foot race with McCoy led to Vick's comments on the Dan Patrick Show.

Vick accepted McCoy's challenge after he had heard enough chirping about his age. He started talking about his speed when Dan Patrick asked about young quarterbacks Kaepernick and Griffin.

"I'm 32, and I've still got a lot of football left in me," Vick said. "I'm still running just as fast and moving just as quick as I did in 2006. After racing LeSean, I still think I run about a 4.4 [in the 40-yard dash], maybe a high 4.4, but my quickness is there."

Vick is adapting to a new offense and competing for the starting job under first-year coach Chip Kelly. The system has read-option elements and features a frenetic pace, which should both cater to Vick's strengths.

If he does, indeed, still have elite speed and can silence those who have criticized his instincts, Vick could be in line for a rebound season.